Onshore Gas Pipeline CAPEX (2005–2030)
14 August 2026
Onshore Gas Pipeline CAPEX (2005–2030)
Key facts:
• Conventional: $4.5M/km (15 projects)
• Mountains: $15.1M/km (4 projects)
• Arctic/Sub-Arctic: $7.9M/km (4 projects)
Conventional
🇺🇸 2008 — Southeast Supply Header | 435 km | 42″ | $3.6M/km
🇺🇸 2009 — Gulf Crossing | 568 km | 42″ | $3.0M/km
🇺🇸 2011 — Tiger Pipeline | 282 km | 42″ | $5.5M/km
🇺🇸 2011 — Fayetteville Express | 301 km | 42″ | $4.8M/km
🇺🇸 2017 — Trans-Pecos + Comanche Trail | 544 km combined | 42″ | $3.3M/km
🇨🇦 2017 — Towerbirch | 87 km | 30–36″ | $5.1M/km
🇲🇽 2018 — Tula–Villa de Reyes | 420 km | 36″ | $1.6M/km
🇺🇸 2018 — NEXUS | 412 km | 36″ | $6.8M/km
🇺🇸 2019 — Gulf Coast Express | 720 km | 42″ | $3.1M/km
🇺🇸 2021 — Permian Highway | 692 km | 42″ | $3.6M/km
🇺🇸 2026E — Hugh Brinson | 644 km | 42″ | $4.2M/km
🇺🇸 2028E — Kosci Junction | 177 km | 36″ | $5.6M/km
🇺🇸 2028E — Mississippi Crossing | 335 km | 36–42″ | $5.1M/km
🇺🇸 2029E — Texas Gateway | 249 km | 36–42″ | $5.6M/km
🇺🇸 2029E — Desert Southwest | 837 km | 48″ | $6.7M/km
Mountains
🇺🇸 2018 — Leach XPress | 257 km | 36″ | $8.2M/km
🇺🇸 2019 — Mountaineer XPress | 274 km | 36″ | $15.1M/km
🇨🇦 2024 — Coastal GasLink | 670 km | 48″ | $16.0M/km
🇺🇸 2024 — Mountain Valley Pipeline | 488 km | 42″ | $21.0M/km
Arctic/Sub-Arctic
🇷🇺 2010 — Zapolyarnoye–Urengoy Looping | 68 km | 56″ | $6.6M/km
🇷🇺 2019 — Power of Siberia | 3,000+ km | 56″ | $6.5M/km
🇨🇦 2020 — North Montney | 206 km | 42″ | $7.0M/km
🇺🇸 2026E — Alaska LNG | 1,299 km | 42″ | $11.6M/km
Methodology
Scope. Analysis covers major onshore natural-gas transmission pipelines commissioned or estimated for 2005–2030. Offshore pipelines are excluded.
Diameter. Benchmark focuses primarily on 36–48″ transmission pipelines, centred around 42″ as a representative diameter for large-capacity gas transmission (~10 bcm/y design case). Selected 56″ Arctic/Sub-Arctic projects are included due to limited availability of comparable northern benchmarks.
CAPEX scope. Project CAPEX includes the pipeline, compressor stations, metering and associated facilities where these costs cannot be reliably separated in published disclosures.
Normalization. Historical CAPEX figures are converted to 2026 USD using applicable historical FX rates and U.S. inflation (CPI). Future projects use the latest sufficiently mature published CAPEX estimate available in 2026.
Data quality. Projects without sufficiently defensible project-specific CAPEX are excluded from the numerical dataset.
Combined projects. Projects are treated as one datapoint where CAPEX cannot reliably be separated — e.g. Trans-Pecos + Comanche Trail.
Arctic/Sub-Arctic. Public cost disclosure is substantially more limited. Bovanenkovo–Ukhta I/II and Kharasavey–Bovanenkovo are excluded from the average because comparable onshore CAPEX cannot be reliably isolated
Mountains. Mountain-project CAPEX may reflect terrain as well as permitting, schedule and execution complexity. The category therefore represents a project benchmark, not a pure geological cost premium.
Averages. Conventional, Mountains and Arctic/Sub-Arctic figures are simple arithmetic means of the included project datapoints and are not weighted by pipeline length, diameter or capacity.
Sources
FERC — project filings, certificates, environmental reviews and approved major pipeline project data
SEC filings / Annual Reports / Form 10-K — project CAPEX and updated investment estimates
TC Energy / Coastal GasLink — project specifications, construction updates and final cost disclosures
Energy Transfer — project specifications, investor disclosures and completion releases
Kinder Morgan — project specifications, CAPEX and investor disclosures
Canada Energy Regulator (CER/NEB) — certificates, applications and project cost filings
Natural Resources Canada — Canadian pipeline project information
Proyectos México / CFE — Mexican pipeline specifications and investment data
Gazprom — corporate disclosures and technical publications for Russian Arctic/Sub-Arctic pipelines
Alaska LNG / Glenfarne — current pipeline configuration and CAPEX estimates
Alaska Legislature / Senate Finance Committee — Alaska LNG project cost disclosures and 2026 updates
Company investor presentations and project completion releases — supplementary project-specific technical and CAPEX data
© Alexei Bykov / REBDUK | www.rebduk.com — Original research and analysis. Feel free to reference or share — we would just appreciate a credit and a link back to the original article.
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